Initial sources

engine/render/indexbuffer.cpp

@@ -0,0 +1,56 @@
+#include "render/indexbuffer.h"
+#include "render/gl_shared.h"
+
+IndexBuffer::IndexBuffer(void* data, size_t size, bool isStream /*= false*/)
+{
+	glGenBuffers(1, &m_buffer);
+	glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_buffer);
+	glBufferData(GL_ELEMENT_ARRAY_BUFFER, size, data, isStream ? GL_DYNAMIC_DRAW : GL_STATIC_DRAW);
+	glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
+
+	//if (isStream) {
+	//	Logger::msg("created dynamic index stream ...");
+	//}
+}
+
+IndexBuffer::~IndexBuffer()
+{
+	glDeleteBuffers(1, &m_buffer);
+}
+
+void IndexBuffer::Bind()
+{
+	glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_buffer);
+}
+
+void* IndexBuffer::MapBuffer(BufferAccess access)
+{
+	GLenum accessGl = 0;
+
+	switch (access)
+	{
+	case BA_READ_ONLY:
+		accessGl = GL_READ_ONLY;
+		break;
+	case BA_WRITE_ONLY:
+		accessGl = GL_WRITE_ONLY;
+		break;
+	case BA_READ_WRITE:
+		accessGl = GL_READ_WRITE;
+		break;
+	}
+
+	Bind();
+
+	void* ptr = glMapBuffer(GL_ELEMENT_ARRAY_BUFFER, accessGl);
+
+	GL_CHECK_ERROR();
+
+	return ptr;
+}
+
+void IndexBuffer::UnmapBuffer()
+{
+	Bind();
+	glUnmapBuffer(GL_ELEMENT_ARRAY_BUFFER);
+}